WO2013030031A1 - Transformateur et son procédé de fabrication - Google Patents

Transformateur et son procédé de fabrication Download PDF

Info

Publication number
WO2013030031A1
WO2013030031A1 PCT/EP2012/066207 EP2012066207W WO2013030031A1 WO 2013030031 A1 WO2013030031 A1 WO 2013030031A1 EP 2012066207 W EP2012066207 W EP 2012066207W WO 2013030031 A1 WO2013030031 A1 WO 2013030031A1
Authority
WO
WIPO (PCT)
Prior art keywords
secondary winding
conductor
winding
transformer according
transformer
Prior art date
Application number
PCT/EP2012/066207
Other languages
German (de)
English (en)
Inventor
Dirk Schekulin
Silvia GROSS-KÄUFLER
Chriss HÄRTSCH
Thomas Bisig
Alex Itten
Piere CAVIN
Original Assignee
Schmidhauser Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schmidhauser Ag filed Critical Schmidhauser Ag
Priority to US14/342,517 priority Critical patent/US10734151B2/en
Priority to EP12751490.9A priority patent/EP2751814B1/fr
Priority to CN201280053809.XA priority patent/CN104054145A/zh
Publication of WO2013030031A1 publication Critical patent/WO2013030031A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/085—Cooling by ambient air
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2876—Cooling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2823—Wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/346—Preventing or reducing leakage fields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor

Definitions

  • the invention relates to a transformer and an associated manufacturing method.
  • High-frequency transformers for high output currents are predominantly planar designs with stamped sheets for the secondary winding.
  • the primary winding is usually also laminated or realized with stranded wire.
  • Another problem is the implementation of the required isolation distances without an excessive increase of the leakage inductances. - -
  • the invention has for its object to provide a transformer and an associated manufacturing method available that allow efficient cooling of the transformer with the least possible effort.
  • the invention achieves this object by a transformer according to claim 1 and a manufacturing method according to claim 12.
  • Preferred embodiments are the subject of the subclaims, the wording of which is hereby made part of the description.
  • the transformer is preferably suitable or provided for clocked power supplies and comprises: a magnetic or magnetizable core, in particular a ferrite core, which defines a winding axis or has a winding axis, at least one primary winding, which is formed by a primary winding conductor, in particular in the form of multi-insulated high-frequency strand, which at least partially surrounds the winding axis of the core or a leg of the core through which the winding axis passes, and at least one secondary winding which is formed by a secondary winding conductor.
  • a magnetic or magnetizable core in particular a ferrite core, which defines a winding axis or has a winding axis
  • at least one primary winding which is formed by a primary winding conductor, in particular in the form of multi-insulated high-frequency strand, which at least partially surrounds the winding axis of the core or a leg of the core through which the winding axis passes
  • secondary winding which is formed by
  • the secondary winding conductor encloses the primary winding conductor, ie the secondary winding conductor and the primary winding conductor form different winding layers over the winding axis, the secondary winding is formed in one layer and a cross section of the secondary winding conductor is rectangular, in particular square. Due to the cross section and the consequent outer contour, the secondary winding can be coupled very easily and with low thermal resistance, for example to a cooling surface.
  • the cross section of the particular massive winding or the solid conductor is deliberately oversized, so that an efficient heat flow within the winding is possible.
  • the secondary winding conductor is massive, i. the complete cross-section of the conductor is filled with conductor material or the conductor is completely filled within its outer dimension with conductor material.
  • the conductor is not constructed by interwoven strands, a plurality of combined individual conductors, as a waveguide or the like.
  • the at least one secondary winding is formed from a solid block of material which is structured to form the secondary winding conductor, in particular by drilling, sawing and / or milling is structured.
  • the at least one secondary winding is formed from a die-cast molding.
  • the transformer has a rated power, wherein the (minimum) cross section of the secondary winding conductor is dimensioned such that a current carrying capacity of the secondary winding conductor is greater than required for the nominal power, i. the cross-section of the conductor is oversized relative to the rated power
  • the secondary winding conductor made of copper or titanium, particularly preferably made of aluminum.
  • a planar cooling element is provided, which is thermally coupled to the secondary winding, in particular to the side of the secondary winding facing away from the winding axis of the core.
  • a heat-conducting electrical insulator is provided, which is arranged between the cooling element and the secondary winding.
  • the electrical insulator is preferably an electrically insulating heat-conducting foil.
  • the secondary winding or the secondary winding conductor forms a thermal bridge to the planar cooling element.
  • Losses and losses of the primary winding (s) go first on the secondary winding (s), in order then to be dissipated, for example, over the flat cooling element in the form of a water-cooled cooling plate can.
  • the secondary winding forms a heat sink.
  • a distance between the primary winding and the core and a distance between the secondary winding and the primary winding are selected such that leakage losses are minimized.
  • the primary winding is as close as possible above the core and the secondary winding is as close as possible to the primary winding, so that there are minimal loss components due to stray fields and a good thermal coupling of the system.
  • the secondary winding is formed from a solid block of material which is patterned to form the conductor, in particular by material-removing machining in the form of drilling, sawing and / or milling.
  • FIG. 1 is an illustration of a transformer according to the invention
  • Fig. 2 is an exploded view of the transformer shown in Fig. 1 and
  • FIG. 3 is an electrical equivalent circuit diagram of that shown in FIGS. 1 and 2
  • a switched-mode power supply transformer 1 having a magnetizable ferrite core 2 with a leg defining a winding axis 3, a first primary winding 4a (see FIG. 2) formed by a first primary winding conductor of multi-insulated high-frequency stranded wire.
  • a second primary winding 4b formed by a second primary winding conductor of multi-insulated high-frequency strand immediately surrounding the winding axis 3 of the core 2, the first primary winding 4a and the second primary winding 4b being axially adjacent the leg are arranged, a first solid secondary winding 5a made of aluminum, which is formed by a first secondary winding conductor 6a, and a second solid secondary winding 5b made of aluminum, which is formed by a second secondary winding conductor 6b
  • bores 9a and 9b are provided as terminals for the first and second secondary winding 5a and 5b, respectively.
  • Isolation elements 10 serve for electrically insulating between the primary and secondary circuits.
  • the secondary winding conductors 6a and 6b enclose their associated primary winding conductor so as to be axially adjacent to the leg.
  • the secondary winding conductors 6a and 6b are each formed in one layer and each have a rectangular cross-section in the winding direction, which is variable in the winding direction.
  • the transformer has a specific rated power, wherein the cross section of the secondary winding conductors 6a and 6b is dimensioned such that their current carrying capacity is greater than required for the nominal power.
  • a flat cooling element 7 is further provided, which is thermally coupled to the side facing away from the winding axis 3 of the core 2 side or surface of the secondary windings 5a and 5b, wherein between the cooling element 7 and the secondary windings 5a and 5b, a heat-conducting electrical Insulator in the form of an electrically insulating heat conducting foil 8 is provided.
  • Corresponding cooling elements may be provided on the upper side and / or the lower side of the secondary windings 5a and 5b.
  • the secondary windings 5a and 5b are each formed from a solid aluminum block of material, which is suitably structured by drilling, sawing, spark erosion and / or milling.
  • the cross-section of the secondary winding conductors 6a and 6b or their minimal cross-section over the entire winding is dimensioned such that at a given operating frequency effective by current displacement replacement surface (skin depth) is significantly smaller than the geometric cross-section of the massive secondary winding conductors 6a and 6b.
  • skin depth current displacement replacement surface
  • Fig. 2 shows for clarity an exploded view of the transformer shown in Fig. 1.
  • Fig. 3 shows an equivalent electrical circuit diagram of the transformer 1 shown in Figs. 1 and 2 with the primary windings 4a and 4b and the secondary windings 5a and 5b.
  • the embodiments shown have massive secondary-side windings 5a and 5b, which are directly above the primary windings 4a - - or 4b are made of multi-insulated high-frequency stranded wire.
  • the primary windings 4a and 4b are arranged at a minimum distance above the ferrite core 2.
  • the (minimum) cross section of the massive secondary windings 5a and 5b is deliberately oversized, so as to achieve an efficient heat flow within the secondary windings 5a and 5b.
  • the insulation of the windings 5a and 5b against the cooling surface 7 takes place with a thin heat-conducting foil 8 or ceramic material.
  • the embodiments shown allow a simple cooling of the transformer 1 via the thermally well connectable massive secondary windings 5a and 5b.
  • the transformer core 2 can also be easily thermally coupled, so that optimal cooling of the entire component is possible. Furthermore, due to the large cross section of the secondary windings 5a and 5b aluminum can be used, which saves weight and costs.
  • the transformer 1 for clocked power supplies has at least one massive (secondary) winding whose cross-section is chosen such that a transport of heat generated during operation loss is possible to a flat heat sink without additional coolant is required. - -

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

L'invention concerne un transformateur (1) pour alimentations électriques synchronisées, comprenant : un noyau (2) magnétisable présentant un axe d'enroulement (3) ; au moins un enroulement primaire (4a, 4b) se présentant sous la forme d'un conducteur d'enroulement primaire qui entoure au moins partiellement l'axe d'enroulement du noyau ; et au moins un enroulement secondaire (5a, 5b) se présentant sous la forme d'un conducteur d'enroulement secondaire (6a, 6b). Selon l'invention, le conducteur d'enroulement secondaire entoure le conducteur d'enroulement primaire, l'enroulement secondaire est formé d'une seule couche et une section du conducteur d'enroulement secondaire est rectangulaire, en particulier carrée.
PCT/EP2012/066207 2011-09-02 2012-08-20 Transformateur et son procédé de fabrication WO2013030031A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US14/342,517 US10734151B2 (en) 2011-09-02 2012-08-20 Transformer and associated production method
EP12751490.9A EP2751814B1 (fr) 2011-09-02 2012-08-20 Transformateur et son procédé de fabrication
CN201280053809.XA CN104054145A (zh) 2011-09-02 2012-08-20 变压器和相关的制造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011082046A DE102011082046A1 (de) 2011-09-02 2011-09-02 Transformator und zugehöriges Herstellungsverfahren
DE102011082046.9 2011-09-02

Publications (1)

Publication Number Publication Date
WO2013030031A1 true WO2013030031A1 (fr) 2013-03-07

Family

ID=46754976

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/066207 WO2013030031A1 (fr) 2011-09-02 2012-08-20 Transformateur et son procédé de fabrication

Country Status (5)

Country Link
US (1) US10734151B2 (fr)
EP (1) EP2751814B1 (fr)
CN (2) CN109346296A (fr)
DE (1) DE102011082046A1 (fr)
WO (1) WO2013030031A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110660563A (zh) * 2019-10-12 2020-01-07 台达电子企业管理（上海）有限公司 磁性组件及电源模块
AT523579A1 (de) * 2020-03-05 2021-09-15 Avl List Gmbh Magnetdrossel, Drosselanordnung und Umrichter mit Drosselanordnung

Citations (5)

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US5175525A (en) * 1991-06-11 1992-12-29 Astec International, Ltd. Low profile transformer
US20090261934A1 (en) * 2008-04-21 2009-10-22 Wolfgram Industries, Inc. High voltage pulse type transformer with increased coupling coefficient through primary and secondary winding proximity
WO2010090534A2 (fr) * 2009-01-28 2010-08-12 Eaton Industries Company Transformateur de puissance haute fréquence et procédé de formation
US20100207714A1 (en) * 2009-02-13 2010-08-19 Delta Electronics, Inc. Transformer structure

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EP0293617A1 (fr) * 1987-06-02 1988-12-07 Vacuumschmelze GmbH Transmetteur de puissance à haute fréquence
US5175525A (en) * 1991-06-11 1992-12-29 Astec International, Ltd. Low profile transformer
US20090261934A1 (en) * 2008-04-21 2009-10-22 Wolfgram Industries, Inc. High voltage pulse type transformer with increased coupling coefficient through primary and secondary winding proximity
WO2010090534A2 (fr) * 2009-01-28 2010-08-12 Eaton Industries Company Transformateur de puissance haute fréquence et procédé de formation
US20100207714A1 (en) * 2009-02-13 2010-08-19 Delta Electronics, Inc. Transformer structure

Also Published As

Publication number Publication date
US20140300438A1 (en) 2014-10-09
DE102011082046A1 (de) 2013-03-07
CN104054145A (zh) 2014-09-17
EP2751814A1 (fr) 2014-07-09
CN109346296A (zh) 2019-02-15
EP2751814B1 (fr) 2018-04-18
US10734151B2 (en) 2020-08-04

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